The complex momentum representation approach and its application to low-lying resonances in <sup>17</sup>O and <sup>29, 31</sup>F

Si-Zhe Xu; Shi-Sheng Zhang; Xiao-Qian Jiang; Michael Scott Smith

doi:10.1007/s41365-022-01159-y

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The complex momentum representation approach and its application to low-lying resonances in ¹⁷O and ^{29, 31}F

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2023-02-13

- The complex momentum representation approach and its application to low-lying resonances in ¹⁷O and ^{29, 31}F
- Nuclear Science and Techniques Vol. 34, Issue 1, Article number: 5(2023)
- Affiliations：
  
  1.School of Physics, and International Research Center for Big-Bang Cosmology and Element Genesis, Beihang University, Beijing 100191, China
  2.Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6354, USA
- Author bio：
  
  † zss76@buaa.edu.cn
  ‡ smithms@ornl.gov
- Funds：
- DOI：10.1007/s41365-022-01159-y
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Si-Zhe Xu, Shi-Sheng Zhang, Xiao-Qian Jiang, et al. The complex momentum representation approach and its application to low-lying resonances in ¹⁷O and ^{29, 31}F. [J]. Nuclear Science and Techniques 34(1):5(2023)
DOI：

Si-Zhe Xu, Shi-Sheng Zhang, Xiao-Qian Jiang, et al. The complex momentum representation approach and its application to low-lying resonances in ¹⁷O and ^{29, 31}F. [J]. Nuclear Science and Techniques 34(1):5(2023) DOI： 10.1007/s41365-022-01159-y.

摘要

Abstract

Approaches for predicting low-lying resonances, uniformly treating bound, and resonant levels, have been a long-standing goal in nuclear theory. Accordingly, we explored the viability of the complex momentum representation (CMR) approach coupled with new potentials. We focus on predicting the energy of the low-lying 2p,3/2, resonance in ,17,O, which is critical for s-process nucleosynthesis and missing in previous theoretical research. Using a Woods-Saxon potential based on the Koning-Delaroche optical model and constrained by the experimental one-neutron separation energy, we successfully predicted the resonant energy of this level for the first time. Our predictions of the bound levels and 1d,3/2, resonance agree well with the measurement results. Additionally, we utilize this approach to study the near-threshold resonances that play a role when forming a two-neutron halo in ,29, 31,F. We found that the CMR-based predictions of the bound level energies and unbound 1f,7/2, level agree well with the results obtained using the scattering phase shift method. Subsequently, we successfully found a solution for the 2p,3/2, resonance with energy just above the threshold, which is decisive for halo formation.

关键词

Keywords

Neutron captureLow-lying resonanceCMRResonance energy

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⁰

The complex momentum representation approach and its application to low-lying resonances in 17O and 29, 31F

DOI：10.1007/s41365-022-01159-y

摘要

Abstract

关键词

Keywords

references

The complex momentum representation approach and its application to low-lying resonances in ¹⁷O and ^{29, 31}F